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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '5eeac4b44a4c182df9284a3cb05854c0a23191be60a570dc936e6b45cfb779b0' 
  AND token = 'ip+cxkdvhZUNYscotZMQnMU3ZsddsdsSvAY9uWMiFjk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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