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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '96372b55f43c13a1f9afad7a036027bd9c6bf464d7d68883b3bef7aafb723ac5' 
  AND token = 'KHS9aoPNTJVrUD4eoge52k/DF3Tc01lINz/uxr9ezvY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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