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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b1ee4ee14e96bfbb8bf62ed50d01c2143b0a1b17ced29f09d072a18c2ad0fd75' 
  AND token = 'o/1J6+UhKKIGSughdiA9F+3bO3Kd7sANZlL1X9pLKxs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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