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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e72fd976d7cc7d982c0636a6461aaf085499746bd3218466872893d327bdfba7' 
  AND token = '+QvA2avGEmQnYkA7S6tf+RI3jMRlS0u62+/f3KBsDQA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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