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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e7cbbe6f8da1fdc64a86de81acaa3b180084ea8de400cdfb4ba1133807be897d' 
  AND token = 'GE/tKeKwG0tgk/61RW+35+FAqA10v9MioVR8ShsAX6A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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