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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '90113bdaf97e6de19ec7ea8d2a2958657a8362e3c22534d913afe17d5a93ea91' 
  AND token = '9yIID4qf7dC+v4qxB8ihwE3goFTAh6nJn16lNf/Vq0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

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