Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c752ab48ff368261e77fe4a18531cb951da1418395fff010bf2ac54c3047936a' 
  AND token = 'Nz0n239P5w2683L88+m5kRPX7WlkYyhzJBUf1vO7UPQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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