Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'abda8e8703eaacc8dafde9c9e9044451973a989c3edc50534c5a451e1e722237' 
  AND token = 'slIdr/wPwg8AsT4ISRqHBRNLPfEPBTmbwfYl/d3gTe4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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