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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5826caeeee80c4e483c1112316ddb0845c5b40397b509b06d6222bb19097a0d2' 
  AND token = 'h5k/a6xc0ZFOOHzjzbn9tvzs8+mO2Zi6yoyjXKNniqA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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