Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'ea995ef91d73a2633e6263ecaf1ed85dcebc0d53c8cf8ec487b99e2e1b51a448' 
  AND token = 'WTSIzHDLMR1FSV1CghXbo0Wr3SGNSWOHZuGlbmK3tYw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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