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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '133f365f93bf1913e9c82941fa2c05f9c8fe5790cfed98cad8cf7e2a07e17288' 
  AND token = 'tcdEBWbzoZ6dwhLs9u1NfW/CoEBywpVV6fquPLtNx18=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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