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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2ae8fcc852f60191fd2a998fbf8dc47ca27dac26fb242f9ec23a686ba2cae908' 
  AND token = 'oJ1MQKBuuciklMYrC+B8U4WMiItYH3073r4Z7RvUNxA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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