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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bba45fa6bd99a0f597f9fa911f5862b88b456a7d353f548822d3eb75ed139c3e' 
  AND token = 'pZbOyDdgXyM40UKdNyWFu03qeszpb+BAKAzQpx4eIMY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00015

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}