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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e9eda68e0555f969520015a5428a842625cc0816b5ec7d7afe4a6cbdef298bc6' 
  AND token = 'fsMajTHU+ZjSB2DyeBwxd7f6S1N5L2mE8DHS8RRro5s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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