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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1afbcce53a8e787fc6f7f29cb0892c6063d098d52d12c00d0ea880253e427fcd' 
  AND token = '7NvlsUPrhEhMZn86JZIyIrP3iDMzQ7T/LWqRcn88xXc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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