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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ebe1d163b7c9e063174b1c40b89e9b4bddc64175bc3151bf486627415bfd276a' 
  AND token = 'oOm9U9zQi35F1wmmgHEeziATaKULIVSj56wqQ/AyzE0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00023

JSON explain

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