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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '60ef23d558d1b36d0f4388e0b4e12e2577bb6111a1b538dfa0181c93c43cdc2a' 
  AND token = '0LIrSXl0NwyKCoGxh78TDkhKIIADBV2os4fwHrR1f3I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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