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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ed2c76cfe10bb1da00757c3b0b2dffe92d8be8a241cb173cbe47779b435647ae' 
  AND token = 'L5e4gEiCFvpl61a0fqKmkWa9bLnYsiqHIXYy5P4E8OE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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