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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0d4cc90c67f24fe6ebba51eb5e3fdf71680ab731ee4edcf0ed47ec922adee565' 
  AND token = 'm0xCdBNrjSRqPFas+J6ocIku3jTCD4LtxAdDAeOehJk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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