SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '6eff8203a8339193b98675e1a0e98f6bb45108c9c1d70d55ae04281cb5e54bc7' 
  AND token = 'hKIXgML7R6Jmz/T/nGmb/H6krwQ6+XCbVmRMFWxW9ic=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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