Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '56767e32b10a3c8697089e6c221cecd6f5c2757687a1c2e736830c623d48b114' 
  AND token = 'c2fMPD8M2tdAfRm+/LYaYH97RR+FuGJoLLwJTZAUPig=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}