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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '8e11744844d9b0135b520099f44fd2f220ba7dac05a234dc7ed66018f27ca4c5' 
  AND token = 'XIP8ZXq0P+ylluy1C2zlqxgor4OjeUN+rTb1J925goU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00035

JSON explain

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