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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'a8372f7a9854980f53a634a0e993a352ca7c3079d85919fcc5c73c4f4f62be40' 
  AND token = 'QnxSn4IG5xheFFtTT/ySxX0p7sJPTA62CQ3oTgoZtTc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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