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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0914b9d3f5bb0707fa728e59691d1c5ca60de8bab2ac254d7609b3c59486bfd0' 
  AND token = 'bU+lEaP7Q3TgVeydudt9DfCXLo7bZPV5wNGO61AonkM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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