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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '00d7f81468c2b5a6f1de148c44e6a65f8dcc295c32eb0368a4f2fad62b6b3478' 
  AND token = 'r07R0ijLu3xszaS7oMt/rO9+VH9bbN0AOS4o7tP1tNY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00056

JSON explain

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