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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '62cca9f7f212424fc4aa1c5c2778fcd465aa88edf9d3b901f8a4ebd2912d2852' 
  AND token = 'skjRU11b0QwLwOvDlXBaO6ADfEGNnBwrukfskMjwEso=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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