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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'fbca36dd8df044f7808379b7bb1482cf6e703275b97a49d47c0ebe4a1bfbc933' 
  AND token = 'ltckHlWhtjacMAuWsfULzcJb527xyjfU4q7QpKlJhTI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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