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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = 'cbde00c192eb741d3ef3293452ece233622ad8ed9b0d57274285aaf620d332e1' 
  AND token = 'i7AZhpmha+ZmEbWmI1CQ6a3J9twAuS3Ez7uPBXnB3Sk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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