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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'df82da7c0bf64d2613bf7ab1e3ee271abfb7d373f16120466741715342897777' 
  AND token = 'Bfp8Q3RRxhsXcapXc0EvVBvyzrPKlyXn0hMz7pN8AR4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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