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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1fc1d4a239da80c48c08e1c7a8d67d0d0aef035bb969b48c2541b13f6c8df889' 
  AND token = 'cOJ9Ch52H3c9e17p54mDr2knjLB6HWNiDJMUfUucoCM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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