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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '59ef12ad2edfa61b4821af8edd29eee6ac1f19c55245d8b49bd9be869373d182' 
  AND token = '9wnLuKk+NKANsD3w/IWFUO/VCHxbYn8GyNeFpbvaIas=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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