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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dbb29b10e43d36956675f8660ae5151f80e691aeee3f66dfe193f206bc55a9a0' 
  AND token = 'N1VlyI0s67hm7SC7uwcrYMYq0LyWNxvADi+S1RtaP90=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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