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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '2c2cde95031828e7219b9564cc19044fca88d9d857f7b7b6ecb07431b9242087' 
  AND token = 'pVfUAvWHbY/q1UCIzFR82JTIJkC54ln5yekzJAhCyuU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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