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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1c4e0f779d5542627e4d47e7e04b5a2051911a685cf879cb49a4ad31e9e3d024' 
  AND token = 'wjS2RXQz1xA71TcmE0aFG++m9wDG/YG3ErGzoa5xQ6o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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