SELECT 
  1 
FROM 
  q_lock_keys 
WHERE 
  key_id = '0f90e5f7c0bcd128c018b1f2b5a523a4bd6776d556c3fcf220222d9107c33091' 
  AND token = 'u2RnYvXNxzZ0zSYqH/AwJcyvlDUwMBbdOVEgydwNres=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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