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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ed13837b7017acb058d15863d78bd1a0e88c8fea344ceba25931963d167b2d70' 
  AND token = 'C4DMe6CnMkNoPzyoiSm/LbahmoQr9FGqc2ppNIDpeaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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