Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '408e4ebc0ac5d474b085b5749fef2d006131af1ca7bd3ad841cba7bb9d778b0b' 
  AND token = 'yvaUnOnkvxQLTMUXkgw66/8IgKYQOhKrAY2YW+wNaZs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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