Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '73d56cc138a51502616caccaa5410e430758a96941d8373237210b1e7ea556e9' 
  AND token = 'gUNUVnLRnY++IG79PmwF2xcCoILm52+KRZ7SLlPv3M8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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