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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'e59dadd6e70f781c4e5c6131ee085d1d57ca9f1230794e9edfef5147ac11ad75' 
  AND token = 'AKhyuJUQQffF2BX1A3DVmK4R01UQaPJIQaas0P+lSLE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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