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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a6e3facecfe9d5cc95e10dca50cc443ae77bbea9b017913867cf433ae6408f1a' 
  AND token = 'FH1TbOktXiEvSBhXr0DsgpQfv6Bhw/kn1NoeZ6C1q14=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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