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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '113b086e3583babffc4e76ea6155a6d57ae3274f3cb3030b07ae72e1eead2c41' 
  AND token = 'Eek13V+s3j6WBR3Qh4IFrXlPQyeh3GKM1gDfHef1tjY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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