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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba10aef94ef010615719d6e5fe885799d450dc1882dc54d561fc955a8abf3b1f' 
  AND token = 'vNVNLTbrimw/NsoRDkq4EVICOWIG1zdzkf5dX3FnXr4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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