Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9a1b7c2e19df04619812723ee8942b1e35b01ae81e9d3d005647cc73005b4baf' 
  AND token = 'Q7Ro664AeajX5Uy/iCmTBMn7+Jl1aIijDqj9op+jKCo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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