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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c880ca92ae1a917b2db59d710a55e2c88a40b0acc2cef078718fc7f7c129e62f' 
  AND token = 'GV3p65ADj1JOjya3D479nQ8XO1+niqi1xnaIM8tdn+g=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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