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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ac70d21cb296f9c3f426a3c3b585ae3040330ec6a65d7dbba50257d10e85a413' 
  AND token = '25H2zoKlsY5q/NZEFBq59u9C1yQTf50nhmIfbTHyriE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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