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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e64a2ecbb238e60b5e7c82f1bdd503b32c5ebf3de459a775043707175868596f' 
  AND token = 'Ml+bDY+K3FX0SvDDgZEuFmPWzptqhcoQ59ED9iE6HYE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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