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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '3025a5e6980e0caefa8edd93cf157caaa94539dbc619be4fcd3f85b7cb8afd30' 
  AND token = 'Q+zr4yeLunc0vWp1Y+715+2GEWwOLrt6wpGGPgBzcOs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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