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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '01aea7f45879be2bec2f1a1b589d498467f452be09ced88daf380f1d4d89a1f2' 
  AND token = 'l/CXiE9hL7GlRcGv83Q6uaT/nXp2B+CdwTn+a4kXfNs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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