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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '11043b5c94501c0b96331623ae4c757a702d9d979256af78b924d2135e004584' 
  AND token = 'xbEKyEukLdNHAnFW2m7dwcUYZ3rW/sfO7zKsaiwwMMo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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