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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'eabbee4b5184c3fa7cafa5b79ee5ae44dd2d54ad679c0bad27143f949e84a581' 
  AND token = '4K9H/c3Os7g4fgbuE/GT0nKpSHbaccXomr5fXEI9GAo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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