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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'd0077e29df107fb7719dde95e37d52d03831cc5e2075c1c0717c8e73565a0517' 
  AND token = '+12ClcGX0fH0i43vTKnqQl36DCmrrJb9Y2cZzDDcB/A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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