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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b65a9d598662f6b709bc2d6d41195d16735e201e00bb58d3f0f7146fe27a61f2' 
  AND token = '2i96BbTEE5JacD5Y5fZbz1kKr7WReHawmG5dN6aFqPo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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