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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'dd7023c8ab8f309679ab3dd283a08d9fa681722dc9374e4c95b8aa372fa121b0' 
  AND token = 'MkpkA+vzTNFjW+7tqhDj9tY27b0UygML3FPgB0nJE8M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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