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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1ae02e8d9616da75ed5cac37e26dfd1d961b2dca4cc64c95ab43428e31bd3509' 
  AND token = 'SWTKZ8QLnohg3YIMv8g2y0pARTdeo9TP/u5Qa2fjL8c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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