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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dd80f0396af375d5fea2796177b97f1c4b2dbe460466a1ea2388f8c4b5784739' 
  AND token = '8NXANwlQLMKWDRZNGodEHucso6orol2ihRI8BWN/tlA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00022

JSON explain

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