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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82ee5d62d65b245871c70445b5b2e4ce5f4649753d5b5ffb00aa43ac71604092' 
  AND token = 'OR/i2p5OnewnWt7RKBq22qMnwQ4+KlfAPgsMVKMLp64=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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