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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c32afe654554bb2575833c6da826a6dd327c460b47ffdea3000fbf0d2d3805d' 
  AND token = '17zTe0OnM7elR95PYUYobVZJd2dy4is0yo84y8X9wD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}