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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '13405f10fd8cefdc61fd337d05e9b508b322df3690c766f869a280d5ae7e448b' 
  AND token = 'JV6Pd/5SJOYhEiH2wOWIv31PrUIXslrppAi7TY7YLto=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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