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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a14f5414d9e80af9a3987c21c36d29625ac1892736d7609b7c30f2ab5e0a42bb' 
  AND token = 'SXXlEsM+i/M2PjY+86kvvIEoBVeKpOCnWs4cd6JcjQM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00050

JSON explain

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