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SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '009cae7112ed62e5373f294e61f6b77394d5d861a7aaf1875c42373b94e605e2' 
  AND token = 'cEoJyj1MYU2Gq/PQnCdanISWFBM7ku8S4wN1mC80QQI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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