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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a7d00ed1f928296955730c24723ccfb42445a33746bfb18c2ad15108e8d74824' 
  AND token = '8y1OcYINvai6FkCmeZzyR+Sr+1tGrs7jFUg+MgFDomw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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