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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '83650860312742bff2a3c5e0ce74432354c05232687c825bbf3ee3383dc4bd41' 
  AND token = 'P0FWvOV1O/3EJMmxcZ2MkxoVyX2iW2Hd5F0LImFpkU0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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