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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '4a53d80719c15505896a36ac7e6689a9e022672cdfd851fa0074449ed89526c3' 
  AND token = 'Dyt7Xr4Rf6/TyMc8n1/b0fOHI14wlqzMfBEgPeJw3Ds=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00090

JSON explain

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