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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e2c04383f61dac56c68d3bf2fef6e0a4f0ab6c42882dcbc92466e2a420ea1491' 
  AND token = 'hLgcmoNewLNZoj4GGh12UHgfwyCFFgjnpUBQu91mbCk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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