Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dca2fd1ea72b49063daa02b9cf55996f842b0ac27aab6ff5e91fe15978121db0' 
  AND token = 'bTA+FSi4IuMyH4kc3no6NT3Fr1wmPJJwjftWEYsS9xg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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