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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'c158b83ec3a313ac4205d95bce8dfc16e71f5be5c90ded23fd866637be5d03ae' 
  AND token = 'vb1YcJb4R0XtpXLdWNtloiXpiy3g52ZwDXNY/C8V2cs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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