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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f1ddffd83e3291e9f28de5b6288e78d80821db269643fd1c3662caa48c9e1352' 
  AND token = 'iZQTumrg3v6pfL0EaJLmHyAkEpYXHrCP4loBqugpZ34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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