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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'be59a09800b3f3b5c7487be582ca8f8b0763798c55299d69e1b5f6596b653bf4' 
  AND token = 'GDoYdIQDYRpPYkKLKRrEOd3w1zufptbQ8HDWH9YwZfA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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