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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '59c560912d9493ccaa151ba8a9b15a7009fbf1b959b464ce6e587b7e7c601fbe' 
  AND token = '7sHgMhobg+NwnG9zXMicQ45iLK75IDJ7Yti3ODPsL4g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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