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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f4269da6b338f5de8d485e91b95479c6bc4a7cbe002b5abdc6cd1ff923c5699' 
  AND token = 'K6B/r1qctH8Z06+4v5I/ap60AX7/x5XqNgbcGSJdztY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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