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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '82053b55e466424b65795f763edb45518dd3535683d82b80f4c69fb93f79d0a0' 
  AND token = 'LrIfx12qbwl4q3zMRWUdTlStwgK31NUxv8du3blhRpo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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