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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5972b39ec4fb4c1ec5299d4fdacb3a9b8b5f903bc77eab4f75d881951b6326b9' 
  AND token = 'EYXxaStaMMYhAWhUYzkTPaIUkKG55Ippd2LF+FcE/aM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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